Based on GAMIT/GLOBK (v10.21) geodetic analysis over
one year of data (January-December 2005), north offset (mm/yr) is lower
in north (near Himalaya) and increases towards southern India (IITK
21.15±1.5; HYDE 24.52±1.92; IISC 25.77±2.21). East offset more in north
(IITK) and decreases towards south (IITK 33.69±2.72; HYDE 28.2±2.65;
IISC 19.19±3.15). Vertical component (U) shows downward movement of
Indian plate (IITK
-17.96±3.11; HYDE
-17.28±2.97; IISC -30.21±3.38).
Rate of plate motion
is higher close to Himalayan range (39.7 mm/yr) and decreases towards
southern India (32 to 37 mm/yr). Resultant plate motion direction (in
horizontal plane) is more towards east close to Himalayan range (57.8°
at IITK; 48.9° at HYDE and 36.6° at IISC).
CHKT statistics are
based on 63 days only and hence omitted from discussion since error
component is very high (>± 20 mm) and long term measurement is necessary
to arrive at precise figure for this site in future. Results computed in
ITRF 2000 reference frame for IITK site are in agreement and consistent
with those of IGS GPS permanent site (HYDE, IISC, LHAS).
We will be happy to share details on geodetic and water vapor
analysis. For queries, analysis of GPS network, use of above
results, GPS data, please send a mail to "ramesh@iitk.ac.in".